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參數資料
| 型號： | MAX7491EEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | 4-Bit D-type Registers with 3-State Outputs 16-CDIP -55 to 125 |
| 中文描述： | DUAL SWITCHED CAPACITOR FILTER, BUTTERWORTH/BESSEL/ELLIPTIC, UNIVERSAL, PDSO16 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-16 |
| 文件頁數： | 10/18頁 |
| 文件大?。?/td> | 343K |
| 代理商： | MAX7491EEE |
M
Dual Universal Switched-Capacitor Filters
10
______________________________________________________________________________________
Table 1. Filter Operating Modes
MODE
LP
HP
BP
N
L P- N
*
H P- N
*
COMMENTS
1
f
CLK
/f
O
ratio is the nominal value. Good for bandpass filters
with identical sections cascaded, higher order Butterworth filters,
high-Q bandpass, low-Q notches.
1B
Same as Mode 1 with f
CLK
/f
O
ratios greater than the nominal
value.
2
Combination of Mode 1 and Mode 3; f
CLK
/f
O
ratios always
less than the nominal value. Less sensitivity to resistor tolerances
than Mode 3.
2N
Extension of Mode 2 that allows higher frequencies. Highpass
and lowpass outputs are summed with external op amp and
two resistors. Good for lowpass elliptic filters.
3
Adjustable f
O
above and below the nominal frequency.
Commonly used for multiple-pole Chebyshev filters, all-pole
higher order bandpass, lowpass, and highpass filters.
3A
Extension of Mode 3 that needs an external op amp and
two additional resistors. Commonly used for lowpass or higher
elliptic or Cauer filters.
* LP-N = lowpass notch, HP-N = highpass notch. Both require an external op amp. See Definition of Terms (Table 2).
Table 2. Definition of Terms
TERM
DEFINITION
f
CLK
The clock frequency applied to the switched-capacitor filter.
f
O
The center frequency of the 2nd-order complex pole pair, f
O
, is determined by measuring the peak response
frequency at the bandpass output.
f
NOTCH
The frequency of minimum amplitude response at the notch output.
Q
Quality factor, or Q, is the ratio of f
O
to the -3dB bandwidth of the 2nd-order bandpass filter. Q also determines
the amount of amplitude peaking at the lowpass and highpass outputs, but is not measured at these outputs.
H
OBP
The gain in V/V of the bandpass output at f = f
O
.
H
OLP
The gain in V/V of the lowpass output at f
→
0Hz.
H
OHP
The gain in V/V of the highpass output at f
→
f
CLK
/2.
H
ON1
The notch output gain as f
→
0Hz.
H
ON2
The notch output gain at f = f
CLK
/2.
LP-N
A notch output with H
ON1
> H
ON2.
HP-N
A notch output with H
ON1
< H
ON2.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX7491EEE+ | 功能描述:有源濾波器 Dual Universal Switched-Cap RoHS:否 制造商:Maxim Integrated 通道數量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7491EEE+T | 功能描述:有源濾波器 Dual Universal Switched-Cap RoHS:否 制造商:Maxim Integrated 通道數量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7491EEE-T | 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX749C/D | 功能描述:顯示驅動器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| MAX749CPA | 功能描述:顯示驅動器和控制器 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
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